How to Apply UV maps to each face
You must apply a new texture with the file with check box. Image Texture. Open the image file.
Enable the texture
Change the mapping to UV.
Select the UV name explicitly to ensure it exists.
You will be able to see the preview with the texture.
Get some texture to appear then correct it.  Do not turn off the texture.


However if you really get stuck.


If you have changed many settings on the texture the situation may be difficult. So keep the UV(the hard work).  Delete the texture in the texture panel. And start a texture fresh with newly minted settings as above.  When you are close to perfect the preview will reflect some change.  Focus on your fresh settings, not some from 2 hours ago. Start fresh.  This is really 5 minutes or less of work.  When the situation improves include a new screen shot of texture settings.